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Add protected pprint.PrettyPrinter methods #14228

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@tobixx tobixx commented Jun 6, 2025

Protected method types are needed for sub-classing support. Else mypy complains like:
"PrettyPrinter" has no attribute "_format_dict_items".

Added more protected methods

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I'm sorry for the late response. Comments below.

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Comment on lines +142 to +150
def _pprint_frozenset(
self,
object: frozenset[object],
stream: SupportsWrite[str],
indent: int,
allowance: int,
context: dict[int, int],
level: int,
) -> None: ...
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This method doesn't seem to exist in any Python version I've checked.

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According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

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